A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Audio/Video Transport Working Group of the IETF.
Title : RTP Payload Format for SVC Video
Author(s) : S. Wenger, et al.
Filename : draft-ietf-avt-rtp-svc-16.txt
Pages : 103
Date : 2008-12-16
This memo describes an RTP payload format for Scalable Video Coding
(SVC) as defined in_Annex G of ITU-T Recommendation H.264, which is
technically identical to Amendment 3 of ISO/IEC International
Standard 14496-10. The RTP payload format allows for packetization
of one or more Network Abstraction Layer (NAL) units in each RTP
packet payload, as well as fragmentation of a NAL unit in multiple
RTP packets. Furthermore, it supports transmission of an SVC stream
over a single as well as multiple RTP sessions. For single-session
transmission the packetization modes of [I-D.ietf-avt-rtp-
rfc3984bis] are used. For multi-session transmission four different
modes are defined in this memo. The modes differ depending on
whether the SVC data are allowed to be interleaved, i.e., to be
transmitted in an order different than the intended decoding order,
and they also differ in the mechanisms provided in order to recover
the correct decoding order of the NAL units across the multiple RTP
sessions. Specifically, decoding order recovery is performed using
either timestamp alignment or Cross-Session Decoding Order Numbers
(CS-DON), although in one of the modes both schemes are used in
order to allow receivers to use their preferred method. The multi-
session transmission modes use the packetization modes defined in
[I-D.ietf-avt-rtp-rfc3984bis] as each individual session still uses
a packetization mode defined in [I-D.ietf-avt-rtp-rfc3984bis]. The
packetization modes defined in [I-D.ietf-avt-rtp-rfc3984bis] are
slightly extended such that the three new NAL unit types defined in
this memo can be included in the RTP packet streams. The payload
format defines a new media subtype name "H264-SVC", but is still
backwards compatible to [I-D.ietf-avt-rtp-rfc3984bis] since the base
layer, when encapsulated in its own RTP stream, must use the H.264
media subtype name ("H264") and the packetization method specified
in [I-D.ietf-avt-rtp-rfc3984bis]. The payload format has wide
applicability in videoconferencing, Internet video streaming, and
high bit-rate entertainment-quality video, among others.
Table of Contents
Status of this Memo...............................................1
Copyright Notice..................................................1
Abstract..........................................................2
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